CN1237521A - Electric vehicle - Google Patents

Abstract

An electromotive bike is characterized in that, a wheel hub 11 is composed of a rotary casing 29 and a fixed easing 36, a transmission 28 for changing a gear ratio is provided in the hub, a motor 39 is provided to surround the outer periphery of the transmission 28, and a torque sensor 52 is provided for detecting the size of an input driving force. The torque sensor 52 is disposed side by side with the motor 39 in the longitudinal direction of an axle 18. The electromotive bike is provided with a compact structure, good assembling performance and water and dust-proof and capable of performing stable running.

Description

Battery-driven car

The present invention relates to a kind of battery-driven car that applies electric driving force by means of the driving of the motor that is located at axis wheel portion to wheel.

In the past, open such as the spy shown in the car of the band auxiliary power described in the clear 50-52737 communique (B62M23/02), this class battery-driven car is provided with drive wheel axle center portion, be divided into rotary sleeve portion and fixed jacket portion, the manpower propulsive effort is to transmit by the sprocket wheel that is located in the rotary sleeve portion, electric driving force from motor is delivered to rotary sleeve portion by speed reduction gearing again after being slowed down by the interior propulsive effort that is located at the motor generation in the fixed jacket portion, like this, by manpower propulsive effort and electric driving force the drive wheel rotation is travelled.

; if such car; can constitute on the side of the motor of fixed jacket portion and be equipped with speed reduction gearing; might make the outer deformation on the axial direction of drive division big; on the bicycle of selling on the market etc., only install under the situation of the wheel that has drive division; the width of the bicycle frame of reserving in advance might be surpassed as words, like this, the bracing frame of bicycle etc. must be changed with the framework of the bicycle sold on the market.

Also have, in this car, for slowing down, the rotative speed to motor to use a plurality of reductors, because of this reductor is designed to be clipped between fixed jacket portion and the rotary sleeve portion, rotary sleeve portion is installed to fixed jacket portion only before, must load onto a lot of gears in the outside of fixed jacket portion, this makes operation become numerous and diverse, assembles very difficulty.

Also have, if such car, because of rotary sleeve portion is only supported one-sided, if the intensity of rotary sleeve portion is not carried out cooresponding raising, long-term use on durability, has problem, if might cause the distortion of rotary sleeve portion because of the deadweight of bicycle and user's weight.

The present invention be exactly with reference to above-mentioned shortcoming with provide have compact constitute, be easy to assemble, waterproof and anti-dust performance are good and can stablize the battery-driven car that travels is purpose.

A kind of battery-driven car of the present invention, it is characterized in that possessing the axletree that has with wheel and be center and the rotary sleeve portion of rotating with wheel, be located on rotary sleeve portion position in opposite directions and with rotary sleeve portion constitute above-mentioned axis wheel portion fixed jacket portion, be located at around the above-mentioned axletree in the above-mentioned axle center part can the conversion gear transmitting ratio variable-speed motor and the rotation motor that drives above-mentioned rotary sleeve portion, said motor is set as periphery coaxial with above-mentioned variable-speed motor and that surround above-mentioned variable-speed motor.

Additional features of the present invention be to possess have by means of manpower make manpower drive division that the rotation of above-mentioned rotary sleeve portion drives, the torque sensor of the manpower propulsive effort size of measuring this manpower drive division and drive the control part of said motor according to the value that this torque sensor is measured, above-mentioned torque sensor is located at vertically going up of above-mentioned axletree and coaxial with motor.

Additional features is that above-mentioned torque sensor is located at around the above-mentioned variable-speed motor with circular-arc.Additional features is that above-mentioned rotary sleeve portion covers the periphery of said fixing outer race section.

Additional features is that above-mentioned rotary sleeve portion is supported at the place, about two ends of the axial direction of above-mentioned axle center part.

Additional features is said fixing outer race section encirclement said motor.

Be delivered to the speed reduction gearing of rotary sleeve portion after additional features is to be provided with the output of said motor slowed down, above-mentioned speed reduction gearing sets with said motor is coaxial.

Additional features is that above-mentioned speed reduction gearing is adapted to and is clipped between said motor and the above-mentioned torque sensor.

Also have additional features to be that above-mentioned speed reduction gearing connects with above-mentioned rotary sleeve portion and accepts transmission of power in above-mentioned torque sensor one side.

According to above formation, the present invention is made of the axle center part of wheel rotary sleeve portion and fixed jacket portion, with motor surround formation around the variable-speed motor that axletree in axle center part is set on every side, can do the radial dimension of axle center part compactly, can do weight gently.

So,, have compact effect because motor and torque sensor and be located on the axletree.

Also have, because of torque sensor is located at the periphery of variable-speed motor, above-mentioned axletree vertically on can be not elongated, can reduce the size of axial direction.

So, because of rotary sleeve portion covers the periphery of fixed jacket portion, being located in can not falling from exterior water droplet, dust etc. above the motor in the fixed jacket portion etc., fault tails off.And because rotary sleeve portion on covering again after in fixed jacket portions of packing into such as motors, assembleability improves.

Also have, rotary sleeve portion surrounds fixed jacket portion, the two ends of the axle center part on axial direction are supported, therefore, the weight of user and battery-driven car can only not be added in one-sided on, but uniform balance be added on the axletree, like this, even if long-term use, rotary sleeve portion can not be out of shape yet, and is expected to improve product design.

Also have, owing to be located in the fixed jacket portion in the motor etc., its periphery is surrounded, and can not mix from exterior water droplet and dust etc., is not easy to cause fault.

Also have, set because of above-mentioned speed reduction gearing and said motor are coaxial, can constitute as common axle with axletree, assembling becomes very simple.

Like this, be clipped between said motor and the above-mentioned torque sensor because of above-mentioned speed reduction gearing is adapted to, the noise of speed reduction gearing part can be by motor and torque sensor shielding.

Also have, make the rotation of rotary sleeve portion by the manpower drive division by torque sensor, because of near this torque sensor one side, being provided with speed reduction gearing, the output of the speed reduction gearing of gear motor output can connect near rotary sleeve portion and part that torque sensor connects, can also make compact conformation except formation becomes simply.

In addition, the another kind of battery-driven car of the present invention, it is characterized in that possessing and the rotary sleeve portion that constitutes axis wheel portion and rotate with wheel is arranged and in this rotary sleeve portion, be located at fixed jacket portion on the car body, in the said fixing outer race section, be provided with motor and speed reduction gearing.

So, it is characterized in that the said fixing outer race section forms the bowl-shape of a side opening, in establish said motor, in above-mentioned opening, be equipped with above-mentioned speed reduction gearing.

Additional features is that speed reduction gearing adopts planetary gear speed reducing mechanism.

Additional features is to be provided with for making the manpower drive division of rotary sleeve portion rotation, this manpower drive division and above-mentioned rotary sleeve portion are adapted to separate rotation, between above-mentioned manpower propulsive effort and rotary sleeve portion, be provided with by the manpower propulsive effort the torque sensor of transmission of power to rotary sleeve portion, the opening of said fixing outer race section and between above-mentioned manpower drive division and above-mentioned rotary sleeve portion formed opening set in opposite directions.

Also have, additional features is to be provided with the collar part of blocking this opening on the medial surface of the rotary sleeve portion of the opening that forms between above-mentioned manpower drive division and the above-mentioned rotary sleeve portion, is provided with control circuit board on the bowl-shape bottom surface lateral wall of said fixing outer race section.

Also have, additional features is to be provided with for making the manpower drive division of rotary sleeve portion rotation, adorns variable-speed motor in being provided with between this manpower drive division and the above-mentioned rotary sleeve portion and on the axletree as the centre of gration of above-mentioned wheel.

Also have, additional features is that above-mentioned variable-speed motor is located at and is positioned at the vertical upward on the position till the middle part of above-mentioned axletree, and above-mentioned rotary sleeve portion is set as the bearing that is subjected to above-mentioned variable-speed motor and is located on the above-mentioned axletree of above-mentioned variable-speed motor part and supports.

Also have, additional features is at the side input of the above-mentioned rotary sleeve portion manpower propulsive effort by means of manpower, the electric driving force that is produced by said motor in the relative side input of a side that is transfused to this manpower propulsive effort.

According to above formation, after slowing down, the electric driving force that the present invention internally is located at the motor in the fixed jacket portion by means of speed reduction gearing makes wheel revolutions.And, in assembling during this drive division,, can assemble drive part by the rotary sleeve portion of packing into of the fixed jacket portion that is provided with motor and speed reduction gearing in the handle.

Also have, opening portion in the said fixing outer race section is equipped with speed reduction gearing, even the output of the electric driving force after slowing down is towards the direction that is easy to connect with rotary sleeve portion, therefore, when packing rotary sleeve portion into, can make it to connect with rotary sleeve portion simply.

Like this, because speed reduction gearing adopts planetary gear speed reducing mechanism, be constituted as the opening of blocking fixed jacket portion, the output of drive division is positioned at the inside face of rotary sleeve portion when being loaded into rotary sleeve portion.

Also have, the opening of fixed jacket portion and between manpower drive division and above-mentioned rotary sleeve portion formed opening set in opposite directions, just in case enter from the opening between manpower drive division and the rotary sleeve portion at rainwater etc., water also can not enter in the motor of fixed jacket portion.

Also have, can block opening between manpower drive division and the rotary sleeve portion because of being provided with collar part, rainwater etc. are not easy the control of access circuit card.

Also have, adorn variable-speed motor on axletree, being provided with in, make wheel revolutions after by the variable-speed motor speed change from the input of manpower drive division.That is to say, can make wheel revolutions, and because of dress variable-speed motor in using, it is compact that structure becomes with the speed change ratio that matches with user's manpower.

Also have, variable-speed motor is located at and is positioned at the vertical upward on the position till the middle part of axletree, rotary sleeve portion is set as the bearing that is subjected to variable-speed motor and is located on the variable-speed motor axletree partly and supports, can be provided so a fixed jacket portion is contained on the non-rotary axletree, and, can stride across vertically setting of axletree to rotary sleeve portion, can make it stably to rotate.

Like this, at a side of rotary sleeve portion input manpower propulsive effort, at the relative side input electric driving force of a side that is transfused to this manpower propulsive effort of axial direction, therefore, the balance that is added in the rotary sleeve portion is good, can make wheel revolutions.

Below, being example with the electrically assisted bicycle of band auxiliary power describes the embodiment of battery-driven car of the present invention.

Battery-driven car related to the present invention has more than and is limited to electrically assisted bicycle, and much less, the battery-operated motor cycle, electronlmobil etc. that with the motor are drive source are so long as are all included by the battery-driven car of motor driven.

Below accompanying drawing is carried out simple declaration.

Fig. 1 is the side cutaway view of the drive division of the embodiment of the invention 1.

Fig. 2 is near the birds-eye view the torque sensor of seeing this drive division from the side.

Fig. 3 is the block scheme of this control circuit.

Fig. 4 is this power system figure.

The lateral plan that Fig. 5 constitutes for this integral body of expression.

Fig. 6 is the side cutaway view of the drive division of the embodiment of the invention 2.

Fig. 7 is near the birds-eye view the torque sensor of seeing this drive division from the side.

Fig. 8 is this power system figure.

Fig. 9 is the block scheme of this control circuit.

Figure 10 is the side cutaway view of the drive division of the embodiment of the invention 3.

Figure 11 is near the birds-eye view the torque sensor of seeing this drive division from the side.

Figure 12 is the side cutaway view of the drive division of the embodiment of the invention 4.

Figure 13 is this power system figure.

Figure 14 is the block scheme of this control circuit.

Figure 15 is the side cutaway view of the drive division of the embodiment of the invention 4.

Among the figure, 11: wheel (trailing wheel), 18: axletree, 29: rotary sleeve portion, 36: fixed jacket portion, 28: variable-speed motor, 39: motor, 52: torque sensor, 40: control part (control circuit board), 44: planetary wheel, 45: fixed gear wheel, 46: output panel, 50: collar part, 31: bearing.

At first, embodiment 1 is described.

With reference to Fig. 5 the single-piece formation of electrically assisted bicycle is described.

1 for connecting the main frame be located at anterior top pipe 2 and be located at the seat support tube 4 of vehicle seat 3 belows, and the stretcher 5 that can rotate by means of manpower is housed at this main frame 1 and above-mentioned seat support tube 4 connecting bridges.

6 is with the action interlock of handle 7 and according to the front-wheel of the operation decision travel direction of handle 7, this front-wheel 6 is made of spoke 8, torus 9, tire 10.

11 is the trailing wheel as drive wheel, and this trailing wheel 11 also is by tire 12, torus 13, spoke 14 and the drive division 15 that is used to drive trailing wheel 11 is constituted.Be provided with torque sensor 52 described later in above-mentioned drive division 15, measure the manpower moment of torsion that transmits by chain 16, and, be provided with microcomputer 58 in also, drive signal is outputed to motor 39 described later after importing the value of this torque sensor 52.

17 preceding sprocket wheels for rotating with the rotation of above-mentioned stretcher 5 hang with chain 16 on this preceding sprocket wheel 17, be used for the rotational power of preceding sprocket wheel 17 is delivered to back sprocket wheel 19 on the axletree 18 that is located at above-mentioned drive division 15.As mentioned above, above-mentioned trailing wheel 11 can be driven by 2 drive divisions and travel, electric driving part 20 that these 2 drive divisions are made up of the interior above-mentioned drive division 15 of establishing motor 39 and the manpower drive division of being made up of above-mentioned stretcher 5, above-mentioned chain 16 etc. 21.

The 22nd, the battery as the power supply of motor 39 described later is equipped with 24 volts nickel-cadmium cell.And battery 22 is detouchables, can charge in doors during charging.Above-mentioned battery 22 is mounted to and is trapped among on the above-mentioned seat support tube 4, and is provided with blocking device 23 below vehicle seat 3, is used to lock above-mentioned battery 22.

24 is preceding bicycle basket, and 25 support the support of bicycle when stopping.

26 illuminate the illumination equipment in the place ahead during for night running.This illumination equipment 26 is made of electrical generator and lamp.

27 for being used for the brake handle of braking rear-wheel 11.

Secondly, with reference to Fig. 1 and Fig. 2 the drive division 15 of this electrically assisted bicycle is described.

28 are the built in type variable-speed motor on the vertical part that is located at above-mentioned axletree 18, this variable-speed motor 28 connects with above-mentioned back sprocket wheel 19 by unidirectional power-transfer clutch (not shown), but above-mentioned stretcher 5 has only a rotation direction transferring power, when making above-mentioned stretcher 5 backward rotation, and the transmission of power conductively-closed between the variable-speed motor 28.

29 rotary sleeve portions for the axle center part of the trailing wheel 11 that to constitute with above-mentioned axletree 18 be the center, this rotary sleeve portion 29 is made up of 2 parts, one is the 29A of rotary sleeve portion that the U word shape ring 30 that is used to install above-mentioned spoke 14 is located at its periphery, and another is to be contained on the above-mentioned axletree 18 and to block the peristome of the above-mentioned rotary sleeve 29A of portion and be screwed the 29B of rotary sleeve portion on above-mentioned ring 30 in many places by bearing 31.

32 is concentric and form the rotating plate of discoid perpendicular wall towards the outside of the 29B of rotary sleeve portion with axletree 18 for being fixed by welding on the above-mentioned rotary sleeve 29B of portion, on the interior week of this rotating plate 32, be provided with brake equipment 33, be used for rotary sleeve portion 29 is promptly braked in the outside with interior all wipe contacts of this rotating plate 32 the rotation that operates in according to above-mentioned brake handle 27.34 for covering these brake equipment 33 exterior drg outer covers.

35 for being used for by the electric wire of above-mentioned battery 22 to 40 power supplies of aftermentioned control circuit board, this electric wire 35 runs through drg outer cover 34, and the part cutting mouthful of passing axletree 18, along the lateral wall of aftermentioned fixed jacket portion 36 and madial wall and control circuit board 40 lines of part along fixed jacket portion 36 are arranged.

36 for being located in the above-mentioned rotary sleeve portion 29 and being fixed on the bowl-shape fixed jacket portion of a opening on the above-mentioned axletree 18, this fixed jacket portion 36 by and the periphery of above-mentioned variable-speed motor 28 between bearing 37 installation that is fixed, make it the rotation of the periphery of the above-mentioned variable-speed motor 28 of not overslaugh, in be provided with DC brushless motor 39 described later and planetary gear reducing mechanism.So, this fixed jacket portion 36 be fixed on above-mentioned axletree 18 vertically on do not establish on the axletree of variable-speed motor 28 parts.

38 for constituting the stator of the motor 39 on the medial surface that is located at said fixing outer race section 36, and this stator 38 is accepted electric power by the control circuit board on the lateral surface that is located at said fixing outer race section 36 40 and supplied with.And said stator 38 is to constitute by coil is entangled on the iron core that is formed with 18 grooves, has the magnet of 12 utmost points.

41 is can be in interior all rotor rotated of said stator 38 by 2 bearings 42 on the medial surface that is located at said fixing outer race section 36, and this rotor 41 is contained on the gear part 43, and this gear part is formed with the path part, some gear on this part.This gear part 43 is sun gear parts of aftermentioned planetary gear reducing mechanism 43,44,45.And above-mentioned rotor 41 has magnet 41a.

Above-mentioned rotor 41 and said stator 38 constitute motor 39 together.Though used the DC brushless motor in the present embodiment, use the motor of other kinds also to have no relations, much less, can make structure become compact more with stepper motor.

44 for being located at 4 planetary wheels between said gear portion 43 and the said fixing outer race section 36, this planetary wheel 44 be fixed on fixed gear wheel 45 and 43 interlocks of said gear portion on weeks in the said fixing outer race section 36, rotate around axletree 18 by the rotation of rotor 41.Also have, 46 for be located at free to rotately above-mentioned planetary wheel 44 separately in the heart and the output panel that can rotate freely by the bearing 47 that is located on the axletree 18, this output panel 46 is located on the 29B of rotary sleeve portion of above-mentioned rotary sleeve portion 29 by the free-wheel clutch 48 that has ratchet device.When the velocity of rotation of trailing wheel 11 was faster than the rotation of the rotary sleeve portion 29 that causes because of manpower, this free-wheel clutch 48 can shield the power of manpower propulsive effort and motor 39.

49 for being fixed on the compressing tablet on above-mentioned variable-speed motor 28 peripheries, this compressing tablet 49 is fixed on the above-mentioned variable-speed motor 28, constituted with the pressing plate 51 that on the position relative, forms by the discoid axle collar 50 that is designed to block formed openings of sizes between variable-speed motor 28 and the 29B of rotary sleeve portion, clipped the torque sensor of forming by magnetostriction element 52 like the compressing between above-mentioned pressing plate 51 and the above-mentioned rotary sleeve 29A of portion with this axle collar 50.That is to say, the 29A of rotary sleeve portion is rotated thereby press to torque sensor 52 from pressing plate 51 by manpower drive division 21 added power.At this moment, on torque sensor 52, can produce corresponding deformation according to the size of manpower propulsive effort.

53 for being installed in magslip between said fixing outer race section 36 and the rotary sleeve portion 29, is installed in coil in the above-mentioned rotary sleeve portion 29 as magslip 53A, is installed in coil in the fixed jacket portion 36 as magslip 53B.This magslip 53 passes to the signal of above-mentioned torque sensor 52 on the control circuit board 40.

Below with reference to Fig. 3 the formation and the signal transfering circuit of above-mentioned torque sensor 52 are described.

The application's torque sensor 52 is made of magnetic core of being made up of magnetostriction element 54 and the coil 55 on these magnetic core 54 peripheries, the power that is applied on the above-mentioned collar part 50 makes it to produce deformation by compressing magnetic core 54, measures the variation inductance of the coil 55 of generation thus.Then, above-mentioned magnetic core 54 is connected on the magslip 53A, and the deformation of magnetic core 54 causes the inductance of magslip 53A one side to change.

56 is the oscillating circuit that makes the oscillation frequency variation according to the inductance of above-mentioned magslip 53A and torque sensor 52.

57 for being connected, measuring from the oscillation frequency of the signal of oscillating circuit 56 and outputing to the frequency measurement circuit of microcomputer 58 with above-mentioned oscillating circuit 56.

Below with reference to Fig. 3 the control circuit of the electrically assisted bicycle of present embodiment is described.

At first, the action to above-mentioned torque sensor 52 describes.

When the startup of bicycle, when acceleration, when stepping on the slope etc. and the time, the magnetic core of being made up of magnetostriction element 54 is clipped between collar part 50 and the rotary sleeve portion 29 stretcher 5 increased force will, power is transmitted, and produces corresponding deformation according to the size of manpower.At this moment, the variation of magnetic core 54 causes the variation inductance of coil 55.

Therefore, the inductance of seeing from the magslip 53B that is connected on the oscillating circuit 56 also changes, thereby the oscillation frequency of oscillating circuit 56 changes.

So the oscillating voltage waveform that is produced by oscillating circuit 56 is imported into frequency measurement circuit 57, this value is imported in the microcomputer 58, then, and according to the drive signal of this signal output CD-ROM drive motor 39.

Secondly, the part except that torque sensor 52 in the control circuit is described.

58 is microcomputer, input is from the signal of torque sensor 52, to negative circuit 59, this microcomputer 58 links to each other with the constant voltage circuit 60 of the voltage that reduces above-mentioned battery 22, and carries out work as power supply according to the signal magnitude output drive signal of manpower propulsive effort.Then, by a plurality of FET in the drive signal switching negative circuit 59 of microcomputer 58 outputs, U, V, W signal output are made rotor 41 rotations to the stator 38 of motor 39.And for measuring the position of rotor 41, the signal wire (SW) that is used to measure the position of rotor 41 is connected to the input port of microcomputer 58.

If this control circuit is described, exactly the manpower propulsive effort signal of being measured by torque sensor 52 is input in the microcomputer 58, output drive signal makes motor 39 to drive with the big or small identical electric driving force of manpower propulsive effort with size.That is to say, export with 1: 1 ratio of manpower driving force ratio electric driving force.The signal of above-mentioned torque sensor 52 is stored in the table data in the microcomputer 58, according to the signal output corresponding driving signal of torque sensor 52 in advance.

Below with reference to Fig. 4 power system figure is described.

At first, the transmission of power to the manpower propulsive effort describes.

When input during from the manpower propulsive effort of stretcher 5, be fixed on preceding sprocket wheel 17 rotations on the stretcher 5, make 19 rotations of back sprocket wheel by chain 16.When 19 rotations of back sprocket wheel, make power only by unidirectional transmission by free-wheel clutch (not shown).

When the power of the direction of advancing is transmitted, after carrying out speed change by the variable-speed motor 28 of setting the specified gear multiplication of user for, make 29 rotations of rotary sleeve portion in magnetic core 54 deformation of in making torque sensor 52, forming, like this, can make trailing wheel 11 rotations by magnetostriction element.

Secondly, the transmission of power to electric driving force describes.

The inductance of being measured by above-mentioned torque sensor 52 changes by magslip 53 and is imported in the microcomputer 58 on the control circuit board 40.Then, according to this signal value signal output is arrived negative circuit 59, the break-make of the FET in the negative circuit 59 causes the change in polarity of stator 38, causes rotor 41 rotations by the magnet that is located on the rotor 41, thus CD-ROM drive motor 39.The driving of motor 39 is that gear part 43, planetary wheel 44 and fixed gear wheel 45 are decelerated by planetary gear reducing mechanism, be output by the output panel 46 that is connected on the above-mentioned planetary wheel 44 again, make 29 rotations of rotary sleeve portion by means of free-wheel clutch 48, thereby make trailing wheel 11 rotations.

As mentioned above, manpower propulsive effort and electric driving force produce in rotary sleeve portion 29 and make a concerted effort to drive trailing wheel 11.

Below, the embodiment 2 of the electrically assisted bicycle relevant with battery-driven car of the present invention is described.

Constitute for the integral body in the present embodiment,, omit explanation because of identical with embodiment 1.

Below with reference to Fig. 6 and Fig. 7 drive division 15 is described.And, for the parts identical, enclose identical symbol and describe with embodiment 1.

Compare with embodiment 1, present embodiment is different on the part of torque sensor 52, therefore, only torque sensor 52 parts is described.

49 for being fixed on the compressing tablet on above-mentioned variable-speed motor 28 peripheries, this compressing tablet 49 is fixed on the above-mentioned variable-speed motor 28, constituted with the pressing plate 51 that on 2 positions relative, forms by the discoid axle collar 50 that is designed to block formed openings of sizes between variable-speed motor 28 and the rotary sleeve portion 29, between above-mentioned pressing plate 51 and above-mentioned rotary sleeve portion 29, be provided with as elastomeric spring 61 with this axle collar 50.Then, when transmitting the manpower propulsive efforts, spring 61 being shunk, thereby make 29 rotations of rotary sleeve portion with the corresponding amount of contraction of manpower torque by variable-speed motor 28.

62 is a circular-arc ring, one end 72 is contained in above-mentioned pressing plate 51 1 sides movably, be formed with slotted hole 71, the other end 73 is contained in the rotary sleeve portion 29 and can rotates, with axletree 18 is that the center is provided with two these rings 62 symmetrically, is designed to separately an end 72 near the part that is provided with above-mentioned spring 61, and, the material of ring 62 is used conductor material or magnetic material, uses aluminum products in the present embodiment.

Coil on the interior week of the 53 above-mentioned rings 62 that are shifted for the contraction that is located at according to spring 61, this coil 53 is by control circuit board 40 power supplies, the variation inductance that displacement caused of ring 62 is input on the control circuit board 40 as the electric signal of manpower torque, according to this signal value control motor 39.

68 is a position-detection sensor, is used to detect the position of rotation into drive controlling motor 39 necessary rotors 41, and the signal of this position-detection sensor 68 is imported into microcomputer 58, produces motor control signal.

Below with reference to Fig. 7 the action of above-mentioned ring 62 is specifically described.

When adding big manpower, spring 61 can shrink greatly, encircles 62 thus and shifts to the inboard at an end 72 of pressing plate 51 1 sides.At this moment, near the end 72 of ring 62 pressing plate 51 moves because of the contraction of spring 61, though therefore shift to the inboard, but the other end 73 does not move because of be installed in the rotary sleeve portion 29 by the axle supporting, finally, ring 62 serve as spool to shift to the inboard with this ring other end 73, that is to say that encircling 62 is displaced to two dashdotted states from solid line position.And, when this added big manpower disappears, restoring force because of above-mentioned spring 61, make pressing plate 51 get back to original position, it serves as that axle is got back to original position to encircle 62 the other end 73 that this action causes encircling near 62 ends pressing plate 51, promptly when manpower disappears, shown in solid line: ring 62 moves towards abducent direction.

Because of having used contraction according to spring 61 is the ring 62 that the size of manpower moment of torsion changes displacement, and the inductance of coil 53 is changed, size that can electricity consumption signal output manpower moment of torsion.

Power system figure below with reference to Fig. 8 describes action.

Present embodiment is the same with embodiment 1, when the user is pedaled stretcher 5, spring 61 is shunk, and rotary sleeve portion 29 rotates when spring 61 shrinks then, causes wheel 11 rotations by the manpower propulsive effort like this.

This moment, the contraction because of spring 61 made that an end 72 of ring 62 is oppressed, and the interval between ring 62 and the coil 53 changes, and caused the inductance of coil 53 to change thus, and this variation is imported on the control circuit board 40 as electric signal.Motor 39 is the size driving of manpower moment of torsion according to the size of this electric signal then, is delivered in the rotary sleeve portion 29 after the propulsive effort of manpower propulsive effort and motor 39 is synthetic.

If the output transfer route to motor 39 is elaborated, then when rotor 41 rotation, by bearing be located at rotor 41 as 43 rotations of the gear part on the periphery of the variable-speed motor 28 of a unit design.Being located at the planetary wheel 44 that is fixed between fixed jacket portion 36 in-to-in fixed gear wheels 45 and the said gear portion 43 then revolves round the sun around gear part 43 on one side because of the rotation rotation on one side of gear part 43.Also have, the output panel 46 that is designed to be subjected to the axle supporting in the heart and penetrate variable-speed motor 28 in each planetary wheel 44 rotates because of the revolution of planetary wheel 44, is located at ratchet 65 interlocks on the output panel 46 and gear and make 29 rotations of rotary sleeve portion.

Below with reference to Fig. 9 the block scheme of control circuit is described.

The explanation of block scheme hereto, the part of omitting the CD-ROM drive motor circuit identical with embodiment 1 describes.

52 is the torque sensor of being made up of above-mentioned spring 61, ring 62, coil 53 etc., this torque sensor 52 microcomputer 58 of ining succession, big or small corresponding electric signal with the manpower moment of torsion is input in the microcomputer 58, and the manpower propulsive effort of this moment and the ratio of electric driving force were output by 1: 1.

68 is a position-detection sensor, is used to detect the position of rotation into drive controlling motor 39 necessary rotors 41, and the signal of this position-detection sensor 68 is imported into microcomputer 58, produces motor control signal.

Embodiment 3 to the electrically assisted bicycle relevant with battery-driven car of the present invention describes below.

Constitute because of identical for the integral body of present embodiment and to omit explanation with embodiment 1.

Below with reference to Figure 10 and Figure 11 drive division 15 is described, and the parts identical with embodiment 1 are enclosed identical symbol describe.

39 are the motor on the periphery that is located at built in type variable-speed motor 28, and this motor 39 is formed by be located at rotor 41 on variable-speed motor 28 peripheries and the stator 38 that is located on these rotor 41 peripheries by bearing 42.Said stator 38 was fixed on the interior week of fixed jacket portion 36.

It is the planet gear reduction that the output of said motor 39 is connected to speed reduction gearing, and this planetary gear reducing mechanism design is on the position that is clipped on the direction of axletree 18 between torque sensor 52 and the motor 39.And on each sun gear 44 of planetary gear reducing mechanism, discoid output panel 46 is housed, make sun gear 44 to rotate freely.When 44 rotations of center gear, output panel 46 slows down and rotates.As mentioned above, because of this planetary gear reducing mechanism designs on the position that is clipped on the direction of axletree 18 between torque sensor 52 and the motor 39, the gear interlock sound of planetary gear reducing mechanism is shielded by motor 39 and torque sensor 52, is not easy to drain to the outside.

63 for being contained in the disk on the above-mentioned output panel 46 respectively by a plurality of bolts 64.On this disk 63, be provided with ratchet 65, this ratchet 65 with and rotary sleeve portion 29 form the gear interlock of a single-piece salient 66, the rotation of output panel 46 makes 29 in rotary sleeve portion make folk prescription to rotation by ratchet 65.

67 for to cover fixed jacket portion 36 and at central part the outer upper shield of opening to be arranged, and penetrate variable-speed motor 28 and torque sensor 52 on this opening, covers the opening of fixed jacket portion 36.

53 is a coil, with above-mentioned ring 62 vicinities, is installed on the opening inner ring of above-mentioned outer upper shield 67, and the shift transformation of ring 62 is become electric signal.

In the present embodiment, identical because of the mechanism of the ring 62 of torque sensor 52 with embodiment 2, omit explanation.

Also have, the electric wire 35 of power supply usefulness is the same with embodiment 1, pass drg overcoat 34 along axletree 18 by distribution in fixed jacket portion 36 and be connected on the control circuit board 40, and control circuit board 40 and coil 53 are provided with the electric wire that is used for feed and transmits electric signal separately.Also have, control circuit board 40 and motor 39 also are provided with the electric wire that is used for drive controlling motor 39.Then, the position-detection sensor 68 that is used to detect rotor 41 positions of motor 39 is arranged on the fixedly madial wall of rotary sleeve portion 36, and this position-detection sensor 68 and control circuit board 40 also are by the electric wire bonded assembly.

Power system figure below with reference to Fig. 8 describes action.

Present embodiment is the same with embodiment 2, when the user is pedaled stretcher 5, spring 61 is shunk, and rotary sleeve portion 29 rotates when spring 61 shrinks then, causes wheel 11 rotations by the manpower propulsive effort like this.

This moment, the contraction because of spring 61 made that an end 72 of ring 62 is oppressed, by the slotted hole 71 that is located on this end 72 interval between ring 62 and the coil 53 is changed, cause the inductance of coil 53 to change thus, this variation is imported on the control circuit board 40 as electric signal.Motor 39 is the size driving of manpower moment of torsion according to the size of this electric signal then, is delivered in the rotary sleeve portion 29 after the propulsive effort of manpower propulsive effort and motor 39 is synthetic.

If the output transfer route to motor 39 is elaborated, then when rotor 41 rotation, by bearing be located at rotor 41 as 43 rotations of the gear part on the periphery of the variable-speed motor 28 of a unit design.Being located at the planetary wheel 44 that is fixed between fixed jacket portion 36 in-to-in fixed gear wheels 45 and the said gear portion 43 then revolves round the sun around gear part 43 on one side because of the rotation rotation on one side of gear part 43.Also have, the output panel 46 that is designed to be subjected to the axle supporting in the heart and penetrate variable-speed motor 28 in each planetary wheel 44 rotates because of the revolution of planetary wheel 44, is located at ratchet 65 interlocks on the output panel 46 and gear and make 29 rotations of rotary sleeve portion.

Below with reference to Fig. 9 the block scheme of control circuit is described.

The explanation of block scheme hereto, the part of omitting the CD-ROM drive motor circuit identical with embodiment 2 describes.

52 is the torque sensor of being made up of above-mentioned spring 61, ring 62, coil 53 etc., this torque sensor 52 microcomputer 58 of ining succession, big or small corresponding electric signal with the manpower moment of torsion is input in the microcomputer 58, and the manpower propulsive effort of this moment and the ratio of electric driving force were output by 1: 1.

68 is a position-detection sensor, is used to detect the position of rotation into drive controlling motor 39 necessary rotors 41, and the signal of this position-detection sensor 68 is imported into microcomputer 58, produces motor control signal.

Embodiment 4 to the electrically assisted bicycle relevant with battery-driven car of the present invention describes below.

Constitute because of identical for the integral body of present embodiment and to omit explanation with embodiment 1.

Below with reference to Figure 12 drive division 15 is described, and the parts identical with embodiment 1 are enclosed identical symbol describe.

At present embodiment, because motor 39 is identical with the formation of embodiment 1, torque sensor 52 is identical with the formation of embodiment 2 and embodiment 3, therefore omits its explanation.

46 is the output panel that takes out after by planetary gear reducing mechanism the output of motor 39 being slowed down, and this output panel 46 is installed on the axletree 18 by bearing 47.Then at the inboard formative gear of output panel 46, along with the rotation of output panel 46 is rotated together.And, on the cylinder gear 69 on the periphery that is fixed in variable-speed motor 28, be provided with ratchet 65, have only certain folk prescription of output panel 46 just can make 69 rotations of cylinder gear to rotation.

Also have, the same with embodiment 1, the electric wire 35 that feed is used pass drg overcoat 34 by distribution in fixed jacket portion 36 and be connected on the control circuit board 40.And control circuit board 40 and coil 53 are provided with the electric wire that is used for feed and transmits electric signal separately.Also have, control circuit board 40 and motor 39 also are provided with the electric wire that is used for drive controlling motor 39.Then, the position-detection sensor 68 that is used to detect rotor 41 positions of motor 39 is arranged on the fixedly madial wall of rotary sleeve portion 36, and this position-detection sensor 68 and control circuit board 40 also are by the electric wire bonded assembly.

Also have, 67 for covering the outer upper shield of above-mentioned outer race section 36 openings, is provided with position-detection sensor 68 outside this on the inboard of upper shield 67, is provided with control circuit board 40 and coil 53 on the outside.And this outer upper shield 67 makes the transmission of power conductively-closed that is caused by variable-speed motor 28 and bearing 37.

Power system figure below with reference to Figure 13 describes action.

Present embodiment is the same with embodiment 1, when the user is pedaled stretcher 5, spring 61 is shunk, and rotary sleeve portion 29 rotates when spring 61 shrinks then, causes wheel 11 rotations by the manpower propulsive effort like this.

This moment, the contraction because of spring 61 made that an end 72 of ring 62 is oppressed, and the interval between ring 62 and the coil 53 changes, and caused the inductance of coil 53 to change thus, and this variation is imported on the control circuit board 40 as electric signal.

On the other hand, if the output transfer route of motor 39 is elaborated, then when rotor 41 rotation, by bearing be located at rotor 41 as 43 rotations of the gear part on the periphery of the variable-speed motor 28 of a unit design.Being located at the planetary wheel 44 that is fixed between fixed jacket portion 36 in-to-in fixed gear wheels 45 and the said gear portion 43 then revolves round the sun around gear part 43 on one side because of the rotation rotation on one side of gear part 43.Also have, the output panel 46 that is designed to be subjected to the axle supporting in the heart and penetrate variable-speed motor 28 in each planetary wheel 44 rotates because of the revolution of planetary wheel 44, make 69 rotations of cylinder gear by the ratchet 65 that is located on the output panel 46, electric driving force is delivered on the periphery of variable-speed motor 28.

Here, if the torque sensor in the present embodiment 52 is described, the spring 61 that then constitutes torque sensor 52 is adapted to after the output of variable-speed motor 28 to be measured, different with the foregoing description, because of electric driving force is delivered on the variable-speed motor 28 by power, the contraction of this spring 61 can be measured making a concerted effort of manpower propulsive effort and these two power of electric driving force.Therefore, control circuit in the present embodiment is under the situation that will export the electric driving force identical with manpower propulsive effort size, deduct electric driving force by the moment of torsion of measuring and calculate the manpower propulsive effort, control motor 39 enables to export and the corresponding electric driving force of the size of this manpower moment of torsion.At this moment, can calculate the electric driving force that deducts by detection, computing motor current.

Below with reference to Figure 14 the block scheme of control circuit is described.

This block scheme pair and embodiment 2,3 identical parts are omitted explanation.

70 for measuring the current sensor by electric current on the motor 39, and this current sensor 70 is input to the signal of the current value of measuring in the microcomputer 58.

Then, microcomputer 58 is the drive signal that computing output motor 39 is carried out on the basis with the signal value from above-mentioned torque sensor 52 and above-mentioned current sensor 70.Specifically, as mentioned above, the size of the moment of torsion of being measured by torque sensor 52 is the making a concerted effort of moment of torsion of manpower and motor 39, deducts by the value of the output torque of the motor 39 of trying to achieve from the signal of above-mentioned current sensor 70 from this value and calculates the manpower moment of torsion.Then, output drive signal forms the big or small identical electric driving force with this manpower moment of torsion to motor 39.

Embodiment 5 to the electrically assisted bicycle relevant with battery-driven car of the present invention describes below.

Constitute because of identical for the integral body of present embodiment and to omit explanation with embodiment 1.

Below with reference to Figure 15 drive division 15 is described, and the parts identical with embodiment 1 are enclosed identical symbol describe.

The motor 39 of present embodiment and torque sensor 52 omit explanation because of identical with the formation of embodiment 4.

46 for being used to take out the output panel on the planetary wheel 44 of being contained in of motor 39 outputs, and this output panel 46 connects with variable-speed motor 28.The ratchet that is provided with in embodiment 4 is not established in the present embodiment.

The 67 outer upper shields for the opening that is used to cover fixed jacket portion 36, this outer upper shield 67 runs through axletree 18 and is being fixed.

The electric wire that distribution is used in the present embodiment pass drg overcoat 34 along outer upper shield 67 by distribution in fixed jacket portion 36 and be connected on the control circuit board 40, and control circuit board 40 and coil 53 are provided with the electric wire that is used for feed and transmits electric signal separately, also have, control circuit board 40 and motor 39 also are provided with the electric wire that is used for drive controlling motor 39.Then, the position-detection sensor 68 that is used to detect rotor 41 positions of motor 39 is arranged on the fixedly madial wall of rotary sleeve portion 36, and this position-detection sensor 68 and control circuit board 40 also are by the electric wire bonded assembly.

Regard to the power transmission line of present embodiment and the block scheme of control circuit down, except be not provided with on ratchet 65 this point different with embodiment 4, omit explanation because of other parts are identical.

The formation of first kind of battery-driven car according to the present invention, because of motor is set as periphery coaxial with above-mentioned variable-speed motor and that surround above-mentioned variable-speed motor, the radial dimension of axle center part is diminished, except drive part becomes the compactness, also have and make large-scale in the past and structure weight become miniaturization and weight-saving effect.

Then, according to above-mentioned formation, Yin Mada and torque sensor are set as with axletree coaxial altogether, can necessary parts be set around variable-speed motor, have the effect that makes integral structure become compact.

Also have,,, can on the periphery of variable-speed motor, set torque sensor, have the effect that makes the size decreases on axial direction because of torque sensor is located on the above-mentioned variable-speed motor periphery with circular-arc according to above-mentioned formation.

Also have,,, can not fall in the fixed jacket portion that electric components such as motor are housed, have the effect that reduces fault from exterior water droplet, dust etc. because of the periphery of covering fixed jacket portion of rotary sleeve portion according to above-mentioned formation.

Also have, according to above-mentioned formation, because of rotary sleeve portion is supported at the place, about two ends of the axial direction of axle center part, with only comparing in the past in one-sided situation about being supported, battery-driven car and user's weight is added on the axletree equably, can carry out stable travelling, have the effect that can prevent to cause the distortion of rotary sleeve portion because of long-term use.

Also have,,,, have the effect that reduces fault even if,, can prevent that water droplet and dust are bonded on the motor owing to be covered with fixed jacket portion just in case water droplet and dust are incorporated in the rotary sleeve portion because of fixed jacket portion surrounds said motor according to above-mentioned formation.

Also having, according to above-mentioned formation, set because of speed reduction gearing and said motor are coaxial, can be that common axle constitutes with the axletree, has the very simple effect of assembling.

Then, according to above-mentioned formation, because of being adapted to, the speed reduction gearing that is used for gear motor output is clipped between motor and the torque sensor, the noises such as gear sound that produced by reductor are shielded by motor and torque sensor, drain to exterior sound and diminish, have the effect that does not make the user that offending impression be arranged.

Also have, according to above-mentioned formation, because of speed reduction gearing is connected in the rotary sleeve portion and accepts transmission of power in torque sensor one side, connect output near the part that can connect, except constituting simply, also have the effect that the structure of making becomes compact from speed reduction gearing at torque sensor with rotary sleeve portion.

According to as another battery-driven car of the present invention, possessing has by the rotary sleeve portion that constitutes axis wheel portion and together rotate with axletree and be located at fixed jacket portion on the car body in rotary sleeve portion, because of built-in motor and speed reduction gearing in fixed jacket portion, when assembling, install in the rotary sleeve portion and can adorn drive division by the fixed jacket portion that keeps motor and speed reduction gearing in the handle, have effects such as assembling is very simple.

Also have, formation according to above-mentioned another battery-driven car, because of fixed jacket portion forms bowl-shape, the built-in motor of openings at one side and set speed reduction gearing on opening, make the output of drive part be positioned on the side of fixed jacket portion, therefore, when installing to fixed jacket portion in the rotary sleeve portion, easily the output from motor is connected in the rotary sleeve portion, have effects such as the assembleability of improvement.

Also have,,, can constitute the bowl-shape opening of blocking fixed jacket portion, have effects such as to make compact conformation because of speed reduction gearing adopts planetary gear speed reducing mechanism according to the formation of above-mentioned another battery-driven car.

Then, formation according to above-mentioned another battery-driven car, be provided with the manpower drive division that is used to rotate rotary sleeve portion, be adapted to and make manpower drive the generation dislocation rotation of discord rotary sleeve portion, torque sensor on being provided with between manpower propulsive effort and the rotary sleeve portion from manpower propulsive effort transmission of power to rotary sleeve portion, the opening of fixed jacket portion and between manpower drive division and rotary sleeve portion formed opening set in opposite directions, therefore, water droplets such as rain can not fall in the fixed jacket portion, promptly have need not carry out water-proofing treatment to motor and just can prevent effects such as water droplet.

Also have; formation according to above-mentioned another battery-driven car; on the rotary sleeve portion inner face of formed opening between manpower drive division and the rotary sleeve portion, be provided with the collar part of blocking opening; because of on the lateral wall of the bowl-shape bottom surface of fixed jacket portion, being provided with control circuit board; even have water droplet to enter from the opening between manpower drive division and the rotary sleeve portion; can block water droplet because of being provided with collar part, water droplet also is not easy to run into control circuit board, has not to be subjected to effects such as moisture effects by the protective circuit plate.

Also have, formation according to above-mentioned another battery-driven car, be provided with to making the manpower drive division of rotary sleeve portion rotation, be contained between manpower drive division and rotary sleeve portion, being provided with as the variable-speed motor on the axletree of the centre of gration of wheel, therefore, except add because of electric driving force produce auxiliary can also make the user to travel by variable-speed motor with specified optimum gear speed transmitting ratio, except allowing the user feel to travel the happiness, also, has the effect that the structure of making becomes compact because of ensconcing in the rotary sleeve portion in the variable-speed motor.

Also have, formation according to above-mentioned another battery-driven car, variable-speed motor is located at and is positioned at the vertical upward on the position till the middle part of axletree, rotary sleeve portion is set as the bearing that is subjected to variable-speed motor and is located on the above-mentioned variable-speed motor above-mentioned axletree partly and supports, therefore, can be installed in fixed jacket portion simply on the non-rotary axletree, and, because of being subjected to axletree and variable-speed motor, rotary sleeve portion supports, can stride across vertical installation of axletree, can set rotary sleeve portion with good balance, have effects such as to obtain stable rotation.

Also have, formation according to above-mentioned another battery-driven car, the one side input of rotary sleeve portion is by means of the manpower propulsive effort of manpower, the electric driving force that produces by motor in the relative side input of a side that is transfused to this manpower propulsive effort, be added in force rate on the wheel than balance, can not wave during driving, have effects such as to obtain stable rotation.

Claims (17)

1. battery-driven car, it is characterized in that possessing the axletree that has with wheel and be center and the rotary sleeve portion of rotating with wheel, be located on rotary sleeve portion position in opposite directions and with rotary sleeve portion constitute above-mentioned axis wheel portion fixed jacket portion, be located at around the above-mentioned axletree in the above-mentioned axle center part can the conversion gear transmitting ratio variable-speed motor and the rotation motor that drives above-mentioned rotary sleeve portion, said motor is set as periphery coaxial with above-mentioned variable-speed motor and that surround above-mentioned variable-speed motor.

2. battery-driven car according to claim 1, it is characterized in that possessing have by means of manpower make manpower drive division that the rotation of above-mentioned rotary sleeve portion drives, the torque sensor of the manpower propulsive effort size of measuring this manpower drive division and drive the control part of said motor according to the value that this torque sensor is measured, above-mentioned torque sensor is located at vertically going up of above-mentioned axletree and coaxial with motor.

3. battery-driven car according to claim 2 is characterized in that above-mentioned torque sensor is located at around the above-mentioned variable-speed motor with circular-arc.

4. battery-driven car according to claim 1 is characterized in that above-mentioned rotary sleeve portion covers the periphery of said fixing outer race section.

5. battery-driven car according to claim 4 is characterized in that above-mentioned rotary sleeve portion is supported at the place, about two ends of the axial direction of above-mentioned axle center part.

6. battery-driven car according to claim 4 is characterized in that said fixing outer race section encirclement said motor.

7. battery-driven car according to claim 2 is characterized in that being provided with the speed reduction gearing that is delivered to after the output of said motor slowed down in the rotary sleeve portion, and above-mentioned speed reduction gearing sets with said motor is coaxial.

8. battery-driven car according to claim 7 is characterized in that above-mentioned speed reduction gearing is adapted to be clipped between said motor and the above-mentioned torque sensor.

9. battery-driven car according to claim 8 is characterized in that above-mentioned speed reduction gearing connects with above-mentioned rotary sleeve portion in above-mentioned torque sensor one side and accepts transmission of power.

10. battery-driven car is characterized in that possessing and the rotary sleeve portion that constitutes axis wheel portion and rotate with wheel is arranged and be located at fixed jacket portion on the car body in this rotary sleeve portion, keeps motor and speed reduction gearing in the said fixing outer race section.

11. battery-driven car according to claim 10 is characterized in that the said fixing outer race section forms the bowl-shape of a side opening, built-in said motor is equipped with above-mentioned speed reduction gearing in above-mentioned opening.

12. battery-driven car according to claim 10 is characterized in that speed reduction gearing adopts planetary gear speed reducing mechanism.

13. battery-driven car according to claim 11, it is characterized in that being provided with for making the manpower drive division of rotary sleeve portion rotation, this manpower drive division and above-mentioned rotary sleeve portion are adapted to separate rotation, be provided with between above-mentioned manpower propulsive effort and the rotary sleeve portion by the manpower propulsive effort the torque sensor of transmission of power to the rotary sleeve portion, the opening of said fixing outer race section and between above-mentioned manpower drive division and above-mentioned rotary sleeve portion formed opening set in opposite directions.

14. battery-driven car according to claim 13, it is characterized in that on the medial surface of the rotary sleeve portion that forms opening between above-mentioned manpower drive division and the above-mentioned rotary sleeve portion, being provided with the collar part of blocking this opening, on the bowl-shape bottom surface lateral wall of said fixing outer race section, be provided with control circuit board.

15. battery-driven car according to claim 10, it is characterized in that being provided with for making the manpower drive division of rotary sleeve portion rotation, in being provided with between this manpower drive division and the above-mentioned rotary sleeve portion and on axletree, adorn variable-speed motor as the centre of gration of above-mentioned wheel.

16. battery-driven car according to claim 10, it is characterized in that above-mentioned variable-speed motor is located at is positioned at the vertical upward on the position till the middle part of above-mentioned axletree, and above-mentioned rotary sleeve portion is set as the bearing that is subjected to above-mentioned variable-speed motor and is located on the above-mentioned axletree of above-mentioned variable-speed motor part and supports.

17. battery-driven car according to claim 10, it is characterized in that at the side input of above-mentioned rotary sleeve portion manpower propulsive effort the electric driving force that produces by said motor in the relative side input of a side that is transfused to this manpower propulsive effort by means of manpower.

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